摘要:
There is provided a precipitation hardening stainless steel powder comprising, in percentage by mass: Si: ≤ 1.0%; Mn: ≤ 1.8%; Ni: 3.0 to 8.5%; Cr: 12.0 to 20.0%; Mo: 0.1 to 2.5%; Cu: 1.0 to 5.0% and/or Ti + Al: 1.0 to 5.0%; Nb + Ta ≥ 5C or Nb ≥5C; N ≤350 ppm; and the balance being Fe and incidental impurities, wherein a sintered compact fabricated from the steel powder has a martensite content of 90% or more. The precipitation hardening stainless steel powder provides a sintered compact that exhibits high strength after aging.
摘要:
A molding machine cylinder comprising a lining layer having a structure comprising 20-50% by area of tungsten carbide particles and 1-10% by area of tungsten-based metal carboboride particles in a nickel-based alloy matrix, and containing 1-7.5% by mass of Fe, can be produced by a centrifugal casting method comprising a first step of heating at higher than 1140°C and lower than 1200°C, and a second step of heating at 1080-1140°C after melting the raw material powder.
摘要:
The present invention relates to a high-purity tantalum powder and a preparation method therefore. The tantalum powder has a purity of more than 99.995%, as analyzed by GDMS. Preferably, the tantalum powder has an oxygen content of not more than 1000 ppm, a nitrogen content of not more than 50 ppm, a hydrogen content of not more than 20 ppm, a magnesium content of not more than 5 ppm, and an average particle diameter D50 of less than 25 µm.
摘要:
A method for producing an electrode material wherein particles containing Cr are miniaturized and uniformly dispersed and Cu portions, which serve as a highly conductive component, are also miniaturized and uniformly dispersed. This method for producing an electrode material involves: a mixing step (S1) for mixing a heat resistant element powder and a Cr powder; a provisional sintering step (S2) for obtaining a solid solution of the heat resistant element and Cr by provisionally sintering the mixed powder; a pulverizing step (S3) for obtaining a solid solution powder of the heat resistant element and Cr by pulverizing the solid solution of the heat resistant element and Cr; a molding step (S4) for molding the solid solution powder; a main sintering step (S5) for obtaining a sintered body (skeleton) of the heat resistant element and Cr by subjecting the thus-obtained molded body to main sintering; and a Cu infiltration step (S6) for infiltrating the sintered body of the heat resistant element and Cr with Cu.
摘要:
A sintered machine part is formed of an iron-based sintered body obtained by molding and sintering raw material powder containing iron-based partially diffusion-alloyed steel powder. The iron-based sintered body has a ratio of carbon of 0.35 wt% or less. The iron-based sintered body has a density of 7.55 g/cm 3 or more. The iron-based sintered body has a square root √area max of an estimated maximum pore envelope area of 200 µm or less in an estimation target region set in a surface layer from a surface to a predetermined depth.
摘要翻译:烧结机部由通过对含有铁基部分扩散合金钢粉末的原料粉末进行成型和烧结而得到的铁基烧结体形成。 铁基烧结体的碳比例为0.35重量%以下。 铁基烧结体的密度为7.55g / cm 3以上。 铁基烧结体在从表面到预定深度的表面层中设置的估计目标区域中具有估计的最大孔包络面积为200μm以下的平方根š最大值。
摘要:
A method for producing titanium powder containing a solid-soluted nitorogen comprises the step of heating titanium powder comprised of titanium particles in a nitrogen-containing atmosphere to dissolve nitrogen atoms and form a solid solution of nitrogen atom in a matrix of the titanium particle.
摘要:
[Object] To provide in particular an Fe-based amorphous alloy powder which has a low glass transition temperature (Tg) and an excellent corrosion resistance and which is used for a dust core or a coil-embedded dust core, each having high magnetic characteristics. [Solution] An Fe-based amorphous alloy powder of the present invention has a composition represented by (Fe 100-a-bc-x-y-z-t Ni a Sn b Cr c P x C y B z Si t ) 100-± M ± . In this composition, 0 at%‰¤a‰¤10 at%, 0 at%‰¤b‰¤3 at%, 0 at%‰¤c‰¤6 at%, 6.8 at%‰¤x‰¤10.8 at%, 2.2 at%‰¤y‰¤9.8 at%, 0 at%‰¤z‰¤4.2 at%, and 0 at%‰¤t‰¤3.9 at% hold, a metal element M is at least one selected from the group consisting of Ti, Al, Mn, Zr, Hf, V, Nb, Ta, Mo, and W, and the addition amount ± of the metal element M satisfies 0.04 wt%‰¤±‰¤0.6 wt%. Accordingly, besides a decrease of Tg, an excellent corrosion resistance and high magnetic characteristics can be obtained.